Effect of kaolinite, silica fines and pH on transport of polymer-modified zero valent iron nano-particles in heterogeneous porous media
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| Veröffentlicht in: | Journal of colloid and interface science 2012-03, Vol.370 (1), p.1-10 |
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| container_title | Journal of colloid and interface science |
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| creator | Kim, Hye-Jin Phenrat, Tanapon Tilton, Robert D. Lowry, Gregory V. |
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| doi_str_mv | 10.1016/j.jcis.2011.12.059 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1671433996</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0021979711015487</els_id><sourcerecordid>1671433996</sourcerecordid><originalsourceid>FETCH-LOGICAL-c418t-e137330f5381ccd08d3b801193c9e176e0be1306ef74c96ccbca6bec685b31b13</originalsourceid><addsrcrecordid>eNp9kcFu1DAQhi0EokvhBTggX5A4NMETJ04scUFVS5EqcYGz5Thj8OLYwc5WKi_Aa-N0lx45zeWbTzP_T8hrYDUwEO_39d64XDcMoIamZp18QnbAZFf1wPhTsmOsgUr2sj8jL3LeswJ2nXxOzpqmGdquhx35c2UtmpVGS3_q6F1wK17Q7LwzmloXMFMdJrrc0BjomnTIS0wP-BL9_YypmuPkrMOJ_sYU6Z32GFbqUsGDDrFadFqd8cXjAv2Ba4G-Y8B4yMWQtjHj5PRL8sxqn_HVaZ6Tb9dXXy9vqtsvnz5ffrytTAvDWiHwnnNmOz6AMRMbJj4O5S3JjUToBbKxIEyg7VsjhTGj0WJEI4Zu5DACPyfvjt4lxV8HzKuaXTbovX64SYHooeVcSlHQ5oiaFHNOaNWS3KzTvQKmtgLUXm0FqK0ABY0qBZSlNyf_YSyPPa78S7wAb0-AzkZ7WyLdHI9cJ2Tf8qFwH44cljTuHCaVjcNgSlipFKam6P53x18o3KZE</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1671433996</pqid></control><display><type>article</type><title>Effect of kaolinite, silica fines and pH on transport of polymer-modified zero valent iron nano-particles in heterogeneous porous media</title><source>ScienceDirect Journals (5 years ago - present)</source><creator>Kim, Hye-Jin ; Phenrat, Tanapon ; Tilton, Robert D. ; Lowry, Gregory V.</creator><creatorcontrib>Kim, Hye-Jin ; Phenrat, Tanapon ; Tilton, Robert D. ; Lowry, Gregory V.</creatorcontrib><description>[Display omitted]
► At pH<7 anionic polyelectrolyte coated NZVI aggregates and deposition increases. ► Surface charge heterogeneity on sand and clay particles increased deposition of NZVI. ► Pre-adsorbing polyelectrolyte on sand and clay and decreases deposition.
Polymer coatings on nano-sized remediation agents and subsurface heterogeneity will affect their transport, likely in a pH-dependent manner. The effect of pH on the aggregation of polymer-coated nanoscale zerovalent iron (nZVI) and its deposition onto sand and clay (kaolinite) surfaces was studied. nZVI coatings included a high molecular weight (90kg/mol) strong polyanion, poly(methacrylic acid)-b-(methy methacrylate)-b-(styrenesulfonate) (PMAA-PMMA-PSS) and a low molecular weight (2.5kg/mol) weak polyanion, polyaspartate. Aggregation and deposition increased with decreasing pH for both polyelectrolytes. The extent was greater for the low MW polyaspartate coated nZVI. Enhanced deposition at lower pH was indicated because the elutability of polyaspartate-modified hematite (which did not aggregate) also decreased at lower pH. The greater deposition onto clay minerals compared to similar sized silica fines is attributed to charge heterogeneity on clay mineral surfaces, which is sensitive to pH. Heteroaggregation between kaolinite particles and nZVI over the pH range 6–8 confirmed this assertion. Excess unadsorbed polyelectrolyte in solution (100mg/L) enhanced the transport of modified nZVI by minimizing aggregation and deposition onto sand and clay. These results indicate that site physical and chemical heterogeneity must be considered when designing an nZVI emplacement strategy.</description><identifier>ISSN: 0021-9797</identifier><identifier>EISSN: 1095-7103</identifier><identifier>DOI: 10.1016/j.jcis.2011.12.059</identifier><identifier>PMID: 22284571</identifier><identifier>CODEN: JCISA5</identifier><language>eng</language><publisher>Amsterdam: Elsevier Inc</publisher><subject>Agglomeration ; Chemistry ; Colloidal state and disperse state ; Deposition ; Environmental nanotechnology ; Exact sciences and technology ; Exposure assessment ; General and physical chemistry ; Heterogeneity ; Kaolinite ; Nanomaterials ; Nanoparticle coatings ; Nanoparticle heteroaggregation ; Nanoparticle transport ; Nanostructure ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Porous materials ; Sand ; Surface modified nanoparticle</subject><ispartof>Journal of colloid and interface science, 2012-03, Vol.370 (1), p.1-10</ispartof><rights>2011 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2011 Elsevier Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c418t-e137330f5381ccd08d3b801193c9e176e0be1306ef74c96ccbca6bec685b31b13</citedby><cites>FETCH-LOGICAL-c418t-e137330f5381ccd08d3b801193c9e176e0be1306ef74c96ccbca6bec685b31b13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jcis.2011.12.059$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3549,27923,27924,45994</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25697438$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22284571$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Kim, Hye-Jin</creatorcontrib><creatorcontrib>Phenrat, Tanapon</creatorcontrib><creatorcontrib>Tilton, Robert D.</creatorcontrib><creatorcontrib>Lowry, Gregory V.</creatorcontrib><title>Effect of kaolinite, silica fines and pH on transport of polymer-modified zero valent iron nano-particles in heterogeneous porous media</title><title>Journal of colloid and interface science</title><addtitle>J Colloid Interface Sci</addtitle><description>[Display omitted]
► At pH<7 anionic polyelectrolyte coated NZVI aggregates and deposition increases. ► Surface charge heterogeneity on sand and clay particles increased deposition of NZVI. ► Pre-adsorbing polyelectrolyte on sand and clay and decreases deposition.
Polymer coatings on nano-sized remediation agents and subsurface heterogeneity will affect their transport, likely in a pH-dependent manner. The effect of pH on the aggregation of polymer-coated nanoscale zerovalent iron (nZVI) and its deposition onto sand and clay (kaolinite) surfaces was studied. nZVI coatings included a high molecular weight (90kg/mol) strong polyanion, poly(methacrylic acid)-b-(methy methacrylate)-b-(styrenesulfonate) (PMAA-PMMA-PSS) and a low molecular weight (2.5kg/mol) weak polyanion, polyaspartate. Aggregation and deposition increased with decreasing pH for both polyelectrolytes. The extent was greater for the low MW polyaspartate coated nZVI. Enhanced deposition at lower pH was indicated because the elutability of polyaspartate-modified hematite (which did not aggregate) also decreased at lower pH. The greater deposition onto clay minerals compared to similar sized silica fines is attributed to charge heterogeneity on clay mineral surfaces, which is sensitive to pH. Heteroaggregation between kaolinite particles and nZVI over the pH range 6–8 confirmed this assertion. Excess unadsorbed polyelectrolyte in solution (100mg/L) enhanced the transport of modified nZVI by minimizing aggregation and deposition onto sand and clay. These results indicate that site physical and chemical heterogeneity must be considered when designing an nZVI emplacement strategy.</description><subject>Agglomeration</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Deposition</subject><subject>Environmental nanotechnology</subject><subject>Exact sciences and technology</subject><subject>Exposure assessment</subject><subject>General and physical chemistry</subject><subject>Heterogeneity</subject><subject>Kaolinite</subject><subject>Nanomaterials</subject><subject>Nanoparticle coatings</subject><subject>Nanoparticle heteroaggregation</subject><subject>Nanoparticle transport</subject><subject>Nanostructure</subject><subject>Physical and chemical studies. Granulometry. Electrokinetic phenomena</subject><subject>Porous materials</subject><subject>Sand</subject><subject>Surface modified nanoparticle</subject><issn>0021-9797</issn><issn>1095-7103</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp9kcFu1DAQhi0EokvhBTggX5A4NMETJ04scUFVS5EqcYGz5Thj8OLYwc5WKi_Aa-N0lx45zeWbTzP_T8hrYDUwEO_39d64XDcMoIamZp18QnbAZFf1wPhTsmOsgUr2sj8jL3LeswJ2nXxOzpqmGdquhx35c2UtmpVGS3_q6F1wK17Q7LwzmloXMFMdJrrc0BjomnTIS0wP-BL9_YypmuPkrMOJ_sYU6Z32GFbqUsGDDrFadFqd8cXjAv2Ba4G-Y8B4yMWQtjHj5PRL8sxqn_HVaZ6Tb9dXXy9vqtsvnz5ffrytTAvDWiHwnnNmOz6AMRMbJj4O5S3JjUToBbKxIEyg7VsjhTGj0WJEI4Zu5DACPyfvjt4lxV8HzKuaXTbovX64SYHooeVcSlHQ5oiaFHNOaNWS3KzTvQKmtgLUXm0FqK0ABY0qBZSlNyf_YSyPPa78S7wAb0-AzkZ7WyLdHI9cJ2Tf8qFwH44cljTuHCaVjcNgSlipFKam6P53x18o3KZE</recordid><startdate>20120315</startdate><enddate>20120315</enddate><creator>Kim, Hye-Jin</creator><creator>Phenrat, Tanapon</creator><creator>Tilton, Robert D.</creator><creator>Lowry, Gregory V.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20120315</creationdate><title>Effect of kaolinite, silica fines and pH on transport of polymer-modified zero valent iron nano-particles in heterogeneous porous media</title><author>Kim, Hye-Jin ; Phenrat, Tanapon ; Tilton, Robert D. ; Lowry, Gregory V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c418t-e137330f5381ccd08d3b801193c9e176e0be1306ef74c96ccbca6bec685b31b13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Agglomeration</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Deposition</topic><topic>Environmental nanotechnology</topic><topic>Exact sciences and technology</topic><topic>Exposure assessment</topic><topic>General and physical chemistry</topic><topic>Heterogeneity</topic><topic>Kaolinite</topic><topic>Nanomaterials</topic><topic>Nanoparticle coatings</topic><topic>Nanoparticle heteroaggregation</topic><topic>Nanoparticle transport</topic><topic>Nanostructure</topic><topic>Physical and chemical studies. Granulometry. Electrokinetic phenomena</topic><topic>Porous materials</topic><topic>Sand</topic><topic>Surface modified nanoparticle</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kim, Hye-Jin</creatorcontrib><creatorcontrib>Phenrat, Tanapon</creatorcontrib><creatorcontrib>Tilton, Robert D.</creatorcontrib><creatorcontrib>Lowry, Gregory V.</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of colloid and interface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kim, Hye-Jin</au><au>Phenrat, Tanapon</au><au>Tilton, Robert D.</au><au>Lowry, Gregory V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of kaolinite, silica fines and pH on transport of polymer-modified zero valent iron nano-particles in heterogeneous porous media</atitle><jtitle>Journal of colloid and interface science</jtitle><addtitle>J Colloid Interface Sci</addtitle><date>2012-03-15</date><risdate>2012</risdate><volume>370</volume><issue>1</issue><spage>1</spage><epage>10</epage><pages>1-10</pages><issn>0021-9797</issn><eissn>1095-7103</eissn><coden>JCISA5</coden><abstract>[Display omitted]
► At pH<7 anionic polyelectrolyte coated NZVI aggregates and deposition increases. ► Surface charge heterogeneity on sand and clay particles increased deposition of NZVI. ► Pre-adsorbing polyelectrolyte on sand and clay and decreases deposition.
Polymer coatings on nano-sized remediation agents and subsurface heterogeneity will affect their transport, likely in a pH-dependent manner. The effect of pH on the aggregation of polymer-coated nanoscale zerovalent iron (nZVI) and its deposition onto sand and clay (kaolinite) surfaces was studied. nZVI coatings included a high molecular weight (90kg/mol) strong polyanion, poly(methacrylic acid)-b-(methy methacrylate)-b-(styrenesulfonate) (PMAA-PMMA-PSS) and a low molecular weight (2.5kg/mol) weak polyanion, polyaspartate. Aggregation and deposition increased with decreasing pH for both polyelectrolytes. The extent was greater for the low MW polyaspartate coated nZVI. Enhanced deposition at lower pH was indicated because the elutability of polyaspartate-modified hematite (which did not aggregate) also decreased at lower pH. The greater deposition onto clay minerals compared to similar sized silica fines is attributed to charge heterogeneity on clay mineral surfaces, which is sensitive to pH. Heteroaggregation between kaolinite particles and nZVI over the pH range 6–8 confirmed this assertion. Excess unadsorbed polyelectrolyte in solution (100mg/L) enhanced the transport of modified nZVI by minimizing aggregation and deposition onto sand and clay. These results indicate that site physical and chemical heterogeneity must be considered when designing an nZVI emplacement strategy.</abstract><cop>Amsterdam</cop><pub>Elsevier Inc</pub><pmid>22284571</pmid><doi>10.1016/j.jcis.2011.12.059</doi><tpages>10</tpages></addata></record> |
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| subjects | Agglomeration Chemistry Colloidal state and disperse state Deposition Environmental nanotechnology Exact sciences and technology Exposure assessment General and physical chemistry Heterogeneity Kaolinite Nanomaterials Nanoparticle coatings Nanoparticle heteroaggregation Nanoparticle transport Nanostructure Physical and chemical studies. Granulometry. Electrokinetic phenomena Porous materials Sand Surface modified nanoparticle |
| title | Effect of kaolinite, silica fines and pH on transport of polymer-modified zero valent iron nano-particles in heterogeneous porous media |
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